微波热处理对SLM成形WC-12Co硬质合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2024.12.002

金属热处理 ›› 2024, Vol. 49 ›› Issue (12): 9-19.DOI: 10.13251/j.issn.0254-6051.2024.12.002

微波热处理对SLM成形WC-12Co硬质合金组织与性能的影响

季文彬^1,2, 程鹏翔^1,2, 戴士杰^1,2, 王子豪^1,2, 吴润禾^1,2

1.河北工业大学机械工程学院, 天津 300401;
2.电工装备可靠性与智能化国家重点实验室, 天津 300401

收稿日期:2024-06-05 修回日期:2024-10-22 出版日期:2024-12-25 发布日期:2025-02-05
作者简介:季文彬(1985—),男,副教授,博士,主要研究方向为硬质合金增材制造,E-mail:2017082@hebut.edu.cn
基金资助:
国家自然科学基金(52005154);科技创新2030-“新一代人工智能”重大项目(2021ZD0113100)

Effect of microwave heat treatment on microstructure and mechanical properties of SLM prepared WC-12Co cemented carbides

Ji Wenbin^1,2, Cheng Pengxiang^1,2, Dai Shijie^1,2, Wang Zihao^1,2, Wu Runhe^1,2

1. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China;
2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin 300401, China

Received:2024-06-05 Revised:2024-10-22 Online:2024-12-25 Published:2025-02-05

摘要/Abstract

摘要： 采用选区激光熔化(Selective laser melting,SLM)技术制备了WC-12Co硬质合金试样,通过正交试验结果分析得到最优SLM工艺参数,对采用该组参数成形的试样进行微波热处理,研究了微波热处理对SLM成形WC-12Co硬质合金组织性能的影响。结果表明,最优SLM工艺参数组合为激光功率100 W、扫描速度390 mm/s、扫描间距0.06 mm;当激光能量密度为97 J/mm³时,试样水平表面微观缺陷最少,相对密度和维氏硬度最高,分别为87.33%和1421 HV3;微波热处理后SLM成形试样微观缺陷数量与热处理前相比大幅减少,材料力学性能显著提高,但WC平均晶粒尺寸增大;当微波热处理温度为1300 ℃、保温时间为20 min、升温速率为15 ℃/min时,SLM成形试样综合力学性能最佳,维氏硬度和抗弯强度达到最大值,分别为1586 HV3和834 MPa,此时相对密度为97.4%。

关键词: 选区激光熔化, 微波热处理, WC-12Co硬质合金, 微观组织, 力学性能

Abstract: Selective laser melting (SLM) technology was used to prepare WC-12Co cemented carbide specimens, and the optimal SLM process parameters were obtained through the analysis of orthogonal test results, and the specimen formed by the optimal process was subjected to microwave heat treatment, and the effect of microwave heat treatment on the microstructure and properties of the SLM-formed WC-12Co cemented carbide was investigated. The results show that the optimal SLM process parameters is laser power of 100 W, scanning speed of 390 mm/s, scanning spacing of 0.06 mm. When the laser energy density is 97 J/mm³, the specimen has the least microscopic defects on the horizontal surface, the highest relative density and Vickers hardness, which are 87.33% and 1421 HV3. The number of microscopic defects on the SLM formed specimen after microwave heat treatment is greatly reduced compared with that before heat treatment, and the mechanical properties of the material are significantly improved, but the average grain size of WC increases. When the microwave heat treatment temperature is 1300 ℃, the holding time is 20 min, and the temperature increase rate is 15 ℃/min, the SLM formed specimen has the best comprehensive mechanical properties, and the Vickers hardness and flexural strength reach the maximum value of 1586 HV3 and 834 MPa, respectively, and the relative density is 97.4%.

Key words: selective laser melting, microwave heat treatment, WC-12Co cemented carbide, microstructure, mechanical properties

中图分类号:

TG156

季文彬, 程鹏翔, 戴士杰, 王子豪, 吴润禾. 微波热处理对SLM成形WC-12Co硬质合金组织与性能的影响[J]. 金属热处理, 2024, 49(12): 9-19.

Ji Wenbin, Cheng Pengxiang, Dai Shijie, Wang Zihao, Wu Runhe. Effect of microwave heat treatment on microstructure and mechanical properties of SLM prepared WC-12Co cemented carbides[J]. Heat Treatment of Metals, 2024, 49(12): 9-19.

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微波热处理对SLM成形WC-12Co硬质合金组织与性能的影响

Effect of microwave heat treatment on microstructure and mechanical properties of SLM prepared WC-12Co cemented carbides

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